At the end of our time on earth, if we have lived fully, we will not be able to say, "i was always happy." hopefully, we will be able to say, "i have experienced a lifetime of real moments, and many of them were happy moments."
There are perhaps no days of our childhood we lived so fully as those we believe we left without having lived them: those we spent with a favourite book.
Every man who has lived his life to the full should, by the time his senior years are reached, have established a reserve inventory of unfinished thinking.
Life has got to be lived - that's all there is to it. At seventy, I would say the advantage is that you take life more calmly. You know that 'this, too, shall pass!'